Links in the Chain: The Contribution of Kettin to the Elasticity of Insect Muscles

  • Belinda Bullard
  • David Goulding
  • Charles Ferguson
  • Kevin Leonard
Part of the Advances in Experimental Medicine and Biology book series (AEMB, volume 481)


Asynchronous flight muscle fibers are activated by periodic stretches and need to be stiff for strain to be transmitted to the contractile system. Kettin associated with thin filaments and projectin with thick filaments contribute to fiber stiffness. Kettin extends along thin filaments with the N-terminus in the Z-disc and the C-terminus outside. C filaments connecting thick filaments to the Z-disc contain projectin but not kettin. Insect flight myofibrils have a titin PEVK epitope which is only exposed on stretch, suggesting it is short and inaccessible. It is concluded that kettin stiffens thin filaments near the Z-disc and projectin and titin provide elasticity to C filaments.


Actin Filament Thin Filament Sarcomere Length Flight Muscle Thick Filament 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer Science+Business Media New York 2000

Authors and Affiliations

  • Belinda Bullard
    • 1
  • David Goulding
    • 1
  • Charles Ferguson
    • 1
  • Kevin Leonard
    • 1
  1. 1.European Molecular Biology LaboratoryHeidelbergGermany

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